There are many reasons why a touch controller may not be detected by a computer.
Ensure you double-check :
If the drivers related to the USB from the computer are not installed or they appear to be not properly installed on the Device Manager it may not allow Displax Skin to be detected
This kind of device may not be capable to handle the number of USB communications, and they may not be providing enough power to the Displax Skin.
For more information please click here.